US4331321A - Lifting device - Google Patents

Lifting device Download PDF

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Publication number
US4331321A
US4331321A US06/149,682 US14968280A US4331321A US 4331321 A US4331321 A US 4331321A US 14968280 A US14968280 A US 14968280A US 4331321 A US4331321 A US 4331321A
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US
United States
Prior art keywords
support structure
support
support arm
suspension portion
slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US06/149,682
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English (en)
Inventor
Anton Laupper
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Individual
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Individual
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F13/00—Common constructional features or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members

Definitions

  • the present invention relates to lifting devices for supporting and/or transporting a load, such as fork lifts or the like, and more particularly to a mechanism for releasably attaching a horizontally extending cantilevered support arm from a vertically extending adjustable lifting structure.
  • a fork-lift auxiliary attachment is provided at the vertically adjustable lifting structure wherein centering may be effected by means of a pair of bolt-shaped projections. Affixation of the added auxiliary attachment is achieved by the use of pawls. Appropriate supporting arms which may be swivelled and shifted are attached to the auxiliary device. Therefore, in devices of this type, a separate auxiliary structure is necessary and as a result a rather significant mechanical effort is required in order to attach the two supporting arms to the lifting structure. If the arrangement of the support arms must be changed or if other supporting arms are to be installed, there then is required extensive assembly work. Alternatively, it may be required that several such auxiliary devices for different areas of application must be made available. However, other devices must then be removed.
  • an end of a horizontally extending cantilevered support arm which faces toward the vertical lifting structure is provided with a contact plate which projects above the support arm perpendicularly to the longitudinal extension thereof.
  • a generally L-shaped or hooked suspension portion may be provided either on the support structure or on the contact plate in order to engage within a slot formed in the other of the support structure or the contact plate.
  • a bolt Arranged in the vicinity of the bottom peripheral area of the contact plate there is also provided a bolt which is affixed to either the contact plate or the support structure with an aperture being provided on the other in order to engage the bolt therein when the support arm is mounted upon the support structure with the hooked suspension portion engaged within the slot.
  • each individual support arm may be maintained in a desired position by means of a suspension mounting with appropriate centering so that no special additional connecting devices in the form of screws or the like will be necessary.
  • the possibility depending upon the applications to which the lifting device is to be directed, for differently constructing supporting arms to be used, especially since substitution and reattachment of one support arm for another becomes rather simple.
  • the possibility to effect different variations of suspension portions in order to effect different adjustments for different shapes and types of loads which must be lifted. Due to the construction, the material expenditure for the supporting arms is quite small and storage of different supporting arms becomes quite simple since they will require little space.
  • involuntary loosening of the connection will not occur because in order to release a support arm it is necessary that it be lifted at its free cantilevered end while also being pulled outwardly in a longitudinal direction.
  • the bolt provided on the support arm or on the lifting structure not only will the special position of the support be centered, but there will also be provided a protective mechanism against unhooking of the suspension portion.
  • FIG. 1 is a schematic side view of a lifting device of the type to which the present invention relates;
  • FIG. 2 is a front view of the device of FIG. 1;
  • FIG. 3 is a partial front view of a vertically adjustable lifting structure of the lifting device
  • FIG. 4 is an enlarged detail view partially in section of a portion of the lifting device.
  • FIG. 5 is a cross-sectional view taken along the line I--I of FIG. 4.
  • a lifting device 1 which may, of course, be configured with regard to the details thereof in different structural arrangements.
  • the device depicted relates to a lifting device which may be equipped, for example, with rollers so that it may be transported to appropriate places by a worker.
  • the lifting device 1 includes a lifting or support structure 2 wherein lifting is effected hydraulically, pneumatically, electrically or mechanically.
  • a device similar to that of the present invention may also be used in connection with motor-driven lifting devices which have similar types of support arms.
  • the lifting device 1 is provided with support arms 3 which, as shown, are located proximate the horizontal extremeties of the lifting or support structure 2.
  • the support arms 3 are detachably connected with the support structure 2 and for this purpose the support arms 3 and/or the adjustable support structure 2 are provided with corresponding suspension means and centering means which engage to assure the desired connection.
  • the suspension and centering means which essentially comprise means for connecting the support arms 3 with the support structure 2 are provided in opposed contact areas between the support arm 3 and the support structure 2 and there is included a suspension portion or hooked member 4 which projects with a hooked configuration. Additionally, there is provided an approximately horizontally extending cantilevered bolt 5 which functions to center the support arm 3.
  • slots 6 and/or apertures 7 are provided.
  • a contact plate 8 is provided which projects upwardly and extends perpendicularly to the longitudinal extension of the arm.
  • a suspension portion 4 which is attached thereto and which is constructed of an approximately L-shaped configuration.
  • the bolt 5 is inserted to extend or cantilever in the same direction as the suspension portion 4.
  • an aperture 7 located at a corresponding position to the bolt 5, with a slot 6 being provided in the support structure 2 for insertion of the suspension portion 4.
  • the support arm 3 may be attached in a simple manner to the support structure 2 and it may be again removed with ease. Nevertheless, when the support arm 3 is applied in its mounted position an appropriate secure fixation will be insured.
  • the suspension portion 4 is inserted into the slot 6 whereupon due to the upward movement of the support arm, a part 9 of the suspension portion 4 will project upwardly and will engage behind the upper edge boundary of the slot 6.
  • the contact plate 8 is placed in this position the bolt 5 will be aligned with the aperture 7 and may be inserted therein.
  • the width of the slot 6 is made equal to or slightly larger than the length of the suspension portion 4. It should also be taken into consideration that insertion of the portion 4 must occur with the contact plate 8 held in a relatively oblique position inasmuch as the bolt 5 may only engage in the opening or aperture 7 after insertion of the suspension portion 4 into the slot 6.
  • the suspension portion 4 and the bolt 5 are expediently arranged symmetrically with respect to the plane of symmetry of the supporting arm 3 and this provides a special effect with regard to favorable absorption of a load to be supported.
  • the forces acting upon the supporting arm will also always tend to extend basically in the direction of a median plane of symmetry.
  • apertures 7 and slots 6 at both end areas or horizontal terminations so that two supporting arms 3, as best seen in FIG. 2, may be attached with an appropriate space provided therebetween.
  • the slots 6 extend obliquely relative to the horizontal and a plane extending through the center of the slot 6 and through the opening 7 represents a mutual plane of symmetry. It is advantageous that the slots be arranged to extend at an angle approximately 45° to the horizontal. This measure is found especially practical when the support arms must be utilized to engage and lift vehicle tires or vehicles which are to be lifted by holding or supporting them at the wheels. In this way, an adjustment of the direction of the acting forces is possible.
  • the support arms 3 may correspond in their cross-sectional configuration to an isosceles triangle wherein the boundary surface 10 on the side of the hypotenuse of such a triangle may extend parallel to the longitudinal extension of the suspension portion 4 in order to form at the same time a supporting surface for the support arm 3.
  • suspension portion 4 and the bolts 5 are staggered at the support arm 3 and the slots 6 and the openings 7 are arranged at the lifting or support structure 2. It will be apparent that the locations of these parts can be reversed at random so that, for example, the suspension portion 4 and the bolt 5 may be arranged on the lifting or support structure 2 with the slot 6 and the opening 7 being arranged at the support arm 3. Also, partial modifications are possible and for instance the suspension portion 4 may be attached at the support arm 3 and the bolt 5 at the lifting or support structure 2, wherein the slot 6 would be provided at the lifting structure 2 and the opening 7 provided at the support arm 3.
  • the cross section of the bolt 5 may of course be structured in different ways and a rectangular or plate-like contstruction is possible. Furthermore, other forms of cross-sectional configurations are conceivable.
  • a significant and important aspect of the arrangement of the suspension portion 4 and the bolt 5 relates to the fact that by utilization of the bolt 5 the position of mounting and of suspension of the suspension portion 4 is insured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Civil Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Handcart (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US06/149,682 1979-05-22 1980-05-14 Lifting device Expired - Lifetime US4331321A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3770/79 1979-05-22
AT377079A AT362102B (de) 1979-05-22 1979-05-22 Hebevorrichtung

Publications (1)

Publication Number Publication Date
US4331321A true US4331321A (en) 1982-05-25

Family

ID=3555193

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/149,682 Expired - Lifetime US4331321A (en) 1979-05-22 1980-05-14 Lifting device

Country Status (6)

Country Link
US (1) US4331321A (de)
EP (1) EP0019053A1 (de)
JP (1) JPS5617897A (de)
AT (1) AT362102B (de)
DK (1) DK222380A (de)
ES (1) ES8102976A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040109522A1 (en) * 2002-12-06 2004-06-10 Mark Smith Boiling water reactor nuclear fuel assembly lifting support

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727914A (en) * 1925-06-19 1929-09-10 Templeton Expanding tool
US2675132A (en) * 1953-01-02 1954-04-13 Charles M Susil Pipe lifting jack
US3165295A (en) * 1962-12-14 1965-01-12 John L Nolden Heavy duty jack
US3232380A (en) * 1963-11-22 1966-02-01 Elmer K Hansen Fork and carriage assembly for lift vehicles
GB1180043A (en) 1967-08-18 1970-02-04 Grundy Arnatt Ltd Vertically Adjustable Shelf Support Assembly.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR470710A (fr) * 1914-04-09 1914-09-26 Felix Wiener & Cie Soc Nouveau mode d'établissement des rayons ou tablettes de bibliothèques ou étagères
US1900569A (en) * 1930-11-21 1933-03-07 Herbert H Lederer Apparatus for handling merchandise
US2678746A (en) * 1950-11-14 1954-05-18 Raymond Corp Industrial lifting truck
DE1042211B (de) * 1956-08-23 1958-10-30 Windenfabrik Gottfried Schober Hubwinde mit hoehenverstellbarer Klaue
US3023919A (en) * 1960-02-15 1962-03-06 Lloyd L Hobson Lift truck attachment
GB1013527A (en) * 1963-11-11 1965-12-15 Skandinavisk Aero Ind As Improvements in and relating to joints between horizontal beams and vertical posts in pallet storage racks and similar structures
DE7711112U1 (de) * 1977-04-07 1977-08-25 Kaiser, Manfred, 3590 Bad Wildungen Schwerlast-kragarmregal - schraublos verstellbar

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727914A (en) * 1925-06-19 1929-09-10 Templeton Expanding tool
US2675132A (en) * 1953-01-02 1954-04-13 Charles M Susil Pipe lifting jack
US3165295A (en) * 1962-12-14 1965-01-12 John L Nolden Heavy duty jack
US3232380A (en) * 1963-11-22 1966-02-01 Elmer K Hansen Fork and carriage assembly for lift vehicles
GB1180043A (en) 1967-08-18 1970-02-04 Grundy Arnatt Ltd Vertically Adjustable Shelf Support Assembly.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040109522A1 (en) * 2002-12-06 2004-06-10 Mark Smith Boiling water reactor nuclear fuel assembly lifting support
US7139353B2 (en) 2002-12-06 2006-11-21 Framatome Anp Inc. Boiling water reactor nuclear fuel assembly lifting support

Also Published As

Publication number Publication date
ATA377079A (de) 1980-09-15
ES491760A0 (es) 1981-02-16
DK222380A (da) 1980-11-23
AT362102B (de) 1981-04-27
ES8102976A1 (es) 1981-02-16
EP0019053A1 (de) 1980-11-26
JPS5617897A (en) 1981-02-20

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